Use with up to three (3) RoomMatch modules for ground stack arrays. Requires subwoofer module in bottom position. Kit includes two (2) frame rails, four (4) M10 x 40mm fasteners, and four (4) leveling feet. Caster kit is available separately. All ground stack array configurations must use the base kit. Overall rail dimensions: 3.0" H x 4.9" W x 54.4" D (75 x 125 x 1382 mm). Net weight: 54 lbs (24.5 kg).